Characterization of Viscoelastic Poisson’s Ratio of Engineering Elastomers via DIC-Based Creep Testing

New data of creep and viscoelastic Poisson’s ratio, [Formula: see text] , of five engineering elastomers (Ethylene Propylene-Diene Monomer, Flouroelastomer (Viton(®)), nitrile butadiene rubber, silicone rubber and neoprene/chloroprene rubber) at different stress (200, 400 and 600 kPa) and temperature (25, 50 and 80 °C) are presented. The [Formula: see text] was characterized through an experimental methodological approach based on creep testing (30 min) and strain (axial and transverse) measurements by digital image correlation. Initially, creep behavior in axial and transverse directions was characterized for each elastomer and condition, and then each creep curve was fitted to a four-element creep model to obtain the corresponding functions. The obtained functions were used to estimate [Formula: see text] for prolonged times (300 h) through a convolution equation. Overall, the characterization was achieved for the five elastomers results exhibiting [Formula: see text] increasing with temperature and time from about 0.3 (for short-term loading) to reach and stabilize at about 0.48 (for long-term loading).